But i guess others would say heck with wasting your solar power on out of date mining gear, if the mining gear wouldn't pay for itself without the low power price your solar gives you then you should upgrade it so you aren't wasting your solar power on inefficient mining gear?
Since people do bother installing solar despite it taking years to pay for itself, oughtn't it make sense that people will similarly install mining gear even if mining gear will take years to pay for itself?
So maybe if you are running into power costing too much, you could consider throwing up some windmills and/or solar panels or something instead of more mining rigs?
-MarkM-
actually dust to dust I'm not sure if current gen solar does pay for itself, you have to take into account the energy used to fabricate the solar system, and dispose of it at the end of lifecylce....and that is large...also degradation of system for power capture (solar cells only work 50% after 7 years or so) not saying tech can't improve...but you always have to do a dust to dust analysis on a system